# # 定义数据结构
# data = {
#     "users": [
#         {
#             "id": 1,
#             "name": "Alice",
#             "address": {
#                 "street": "123 Main St",
#                 "city": "Wonderland",
#                 "country": {"name": "Fantasyland", "code": "FL"}
#             },
#             "friends": [
#                 {"id": 2, "name": "Bob", "location": {
#                     "city": "Nowhere", "country": "Utopia"}},
#                 {"id": 3, "name": "Charlie", "location": {
#                     "city": "Somewhere", "country": "Imaginaria"}}
#             ]
#         },
#         {
#             "id": 2,
#             "name": "Bob",
#             "address": {
#                 "street": "456 Elm St",
#                 "city": "Nowhere",
#                 "country": {"name": "Utopia", "code": "UT"}
#             },
#             "friends": [
#                 {"id": 1, "name": "Alice", "location": {
#                     "city": "Wonderland", "country": "Fantasyland"}},
#                 {"id": 3, "name": "Charlie", "location": {
#                     "city": "Somewhere", "country": "Imaginaria"}}
#             ]
#         }
#     ]
# }

data = {
    "name": "Alice",
    "age": 25,
    "country" : "Imaginaria",
    "list" : [1,2,3,4],
    "dict" : {"a":1, "b":2}
}